I have my aeration system set on a 12 hr. timer from 8 am to 8 pm . I live in the Pac. N/W . I've been running during the day to dissipate the warming water but should I run at night to help with the algae de-composition . I have trout in the pond and I'm starting to get quite a bit of color to my water . I can see down into it maybe 2' or so . It appears to have tannic acid in it as it's got a yellowish color to it .